Question

An inclined plane of length 4.5m and vertical height 1.5m is used to lift a load of 100N. What effort is required if the efficiency is 80%​

Answer 1

Answer:

efficiency = (work output / work input) x 100%

efficiency = ([load force x load distance] x [effort force x effort distance]) x 100%

efficiency = (500 N x 1.0 m) / (100 N x 10 m) x 100%

efficiency = (500 N x m / 1000 N x m) x 100%

efficiency = 0.5 N x 100%

efficiency = 50%